True when the instance document exists but its start never finished: the
create committed, yet priming (stage entry, activities, guard deploy)
did not. The shape is legal and resumable — startInstance with the same
instanceId completes the outstanding commits. Readers should present it
as an incomplete start, never as a normal run sitting at its initial
stage. Terminal instances are excluded: an aborted never-primed instance
reads as aborted, not as still-resumable.
True when the instance document exists but its start never finished: the
createcommitted, yet priming (stage entry, activities, guard deploy) did not. The shape is legal and resumable —startInstancewith the sameinstanceIdcompletes the outstanding commits. Readers should present it as an incomplete start, never as a normal run sitting at its initial stage. Terminal instances are excluded: an aborted never-primed instance reads as aborted, not as still-resumable.